Temperature distributions of radio-frequency plasma in water by spectroscopic analysis
- Graduate School of Science and Engineering, Ehime University, 3 Bunkyo-cho, Matsuyama 790-8577 (Japan)
- Faculty of Agriculture, Ehime University, Matsuyama 790-8566 (Japan)
Distributions of emission intensity from radicals, electron temperature, and rotational temperature at a radio frequency of 27.12 MHz plasma in water are clarified by detailed spectroscopy measurement. Through this investigation, the following were observed. The points of maximum emission intensity of Halpha, Hbeta, O (777 nm), and O (845 nm) are almost the same, while that of OH shifts upward. The electron temperature decreases, while the rotational temperature increases with pressure. The distribution of the electron temperature changes at a threshold pressure, which is concerned with a change in the electron discharge mechanism. The self-bias of the electrode changes from a negative to positive at a threshold pressure. The point of the maximum rotational temperature of OH radicals shifts to approximately 1 mm above that for the maximum intensity of OH emission.
- OSTI ID:
- 21359368
- Journal Information:
- Journal of Applied Physics, Vol. 106, Issue 11; Other Information: DOI: 10.1063/1.3264671; (c) 2009 American Institute of Physics; ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ELECTRIC DISCHARGES
ELECTRODES
ELECTRON EMISSION
ELECTRON TEMPERATURE
ELECTRONS
HYDROXYL RADICALS
ION TEMPERATURE
PLASMA
PLASMA DIAGNOSTICS
PLASMA WAVES
RADIOWAVE RADIATION
SPECTROSCOPY
TEMPERATURE DISTRIBUTION
WATER
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
EMISSION
FERMIONS
HYDROGEN COMPOUNDS
LEPTONS
OXYGEN COMPOUNDS
RADIATIONS
RADICALS